XDMCP Logon to RedHat 7.2

[Andy Lemmon <anlemmon at fedex dot com>]

I'm trying to replace my Hummingbird eXceed Win32 X Server with
Cygwin/Xfree86.

I've gotten all the Cygwin & XFree86 Components in place on my W2k box, and
I can now run X apps remotely by following the procedure:

- Start X Server on W2K
- Add remote RedHat box to xhosts
- Telnet to remote RedHat box
- Configure DISPLAY to point at W2K box
- Execute xterm & (for instance)

That gets me a nice xterm running here on my W2K machine.

However, what I'd really like to do is an XDMCP logon to the aforementioned
RedHat box, so that I don't have to go through this procedure and I can get
the full desktop on the Linux box.  When I try the suggestion in the
Cygwin/XFree86 user's guide,

XWin.exe -query remote_hostname

I just get the default X black-and-white checked background like it's
waiting for the other machine to respond.  I never get the logon screen from
the RedHat box.

I've also tried variations like using

-from my_w2k_ip_address -display 800x600x16

all to no avail (same result).

I believe that Xaccess and such are set up correctly on the RedHat machine
as I haven't changed anything there since my eXceed worked ok.

Can someone please give me a pointer or two?  I've tried to exhaust all
docs, faq's, etc before posting.

Thanks for your help,

Andy

alemmon at midsouth dot rr dot com